From: Sanjay R Mehta <sanju.mehta@xxxxxxx>
If the boot firmware implements a connection manager of its
own it may create a DP tunnel and will be handed off to Linux
CM, but the DP out resource is not saved in the dp_resource
list.
This patch adds tunnelled DP out port to the dp_resource list
once the DP tunnel is discovered.
Signed-off-by: Sanjay R Mehta <sanju.mehta@xxxxxxx>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
---
v2: Re-ordering the function declaration as per Greg's comment.
---
drivers/thunderbolt/tb.c | 15 +++++++++++++++
drivers/thunderbolt/tb.h | 1 +
drivers/thunderbolt/tunnel.c | 2 ++
3 files changed, 18 insertions(+)
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 9a3214f..dcd0c3e 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -1006,6 +1006,21 @@ static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port)
tb_tunnel_dp(tb);
}
+void tb_dp_resource_available_discovered(struct tb *tb, struct tb_port *port)
+{
+ struct tb_cm *tcm = tb_priv(tb);
+ struct tb_port *p;
+
+ list_for_each_entry(p, &tcm->dp_resources, list) {
+ if (p == port)
+ return;
+ }
+
+ tb_port_dbg(port, "DP %s resource available discovered\n",
+ tb_port_is_dpin(port) ? "IN" : "OUT");
+ list_add_tail(&port->list, &tcm->dp_resources);
+}
+
static void tb_dp_resource_available(struct tb *tb, struct tb_port *port)
{
struct tb_cm *tcm = tb_priv(tb);
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 4602c69..a841844 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -1051,6 +1051,7 @@ int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
unsigned int aux_tx, unsigned int aux_rx);
bool tb_dp_port_is_enabled(struct tb_port *port);
int tb_dp_port_enable(struct tb_port *port, bool enable);
+void tb_dp_resource_available_discovered(struct tb *tb, struct tb_port *port);
struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid,
struct tb_port *dst, int dst_hopid,
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 2c3cf7f..1394ae9 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -845,6 +845,8 @@ struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in,
goto err_deactivate;
}
+ tb_dp_resource_available_discovered(tb, tunnel->dst_port);
+
tb_tunnel_dbg(tunnel, "discovered\n");
return tunnel;
--
2.7.4
